dawson



i UNITED STATES PATENT OFFICE.

VIS

GEORGE F. DAWSON, JOHN MYERS, AND JOHN SMITH, OF BRADFORD,

COUNTY OF YORK, ENGLAND.

LOOM.'

SPECIIEIGATIONA forming part of Letters Patent No. 236,994, datedJanuary 25, 1881.

Application filed September 15, 1880. (No model.) Patentedin EnglandMarch 5, 1880.

To all whom 'it-,may concern:

Be it known thatwe', GEORGE FREDERICK DAWSON, JOHN MYERS, and JOHNSMITH, residing in Bradford, in the county of York, England, andsubjectsof the Queen of Great Britain and Ireland, have invented certainImprovements in Looms for Weaving, (for whichwe obtained apatent inGreat Britain, No. 1,105, dated March 5, 1880,) of which the followingis a specification. I

The object of this invention is to arrange the brake apparatus connectedwith warpbeams in looms for weaving in such a manner that whenfthehealds are opening the shed inthe warp for the shuttle to pass throughthe pressure on the brake is relieved and the tension on thewarp-threads reduced to such a degree that there is no materialstretching of the warp-threads, and in case the shuttle should by anymeans stop .in the shed the breakage of Warpethreads is. greatly reducedalso, to so arrange the brake apparatus that the warp-beam is held firmand rigid at each pick of the loom at such time when what is technicallytermed the going part or lay is beating up Ithe weft just delivered fromthe shuttle.

Such being the objects of this our invention, We will describe theparticulars thereof, aided by the accompanying drawings, in Which-Figure 1 represents a transverse sectional"A elevation of a loom,showing such portions of the loom as are required to make clear ourinvention. Fig. 2 is a plan ot' one end of aloom tted with our improvedbrake apparatus, and Fig. 3 is an enlarged view of the brakeclipsandfend of brake-lever.

Similar letters are used in the several iigu-res in indicating identicalparts.

We will describe our apparatus as applied to one end of the warp-beam.At the same time we wish it to be understood that we apply the apparatusat both ends of the warpbeam in wide `looms or when Weaving heavygoods.` A,

The warp-beam A is mounted in the usual manner, and around the ordinarymetal collar, near the end of beam-A, we place brakeclaspsBVwhichIi-ltthe circumference of the These clasps or clips B are said collar.

jointed at C, and have long taper projecting pieces at D, which passthrough a hole formed near the end of lever G. In this hole are alsomounted two small pulleys, H, the eircumferences of which are in contactwith projecting pieces D. One end of the lever G is carried by pin J,which serves as its fulcrum, and the lever is of such a length that theother end is underneath what is technically termed the going part or layK. At the under side of the going part K we secure a small pulley, L,which, at each beat up of the weft, comes in contact with the end oflever G and forces the lever down. The small pulleys H pass down thetaper projections D and nip the same together, and the brake-clips Bhold the warp-beam A tight during the beat up and until the return ofthe going part, when the lever will rise and reduce the pressure of thebrakeclips B on the collar at end of warpbeam A, reducing the tension ofthe warp to such a degree that the healds can Open the shed withoutmaterially stretching or damaging the Warp-threads. The light spiralspring M is applied to lever G, in order to prevent the lever fromjumping on the return-stroke of the going part.

We are aware that it has heretofore been proposed to combine a brakewith a warpbeain, the brake being applied through the medium of the layat each beat up. This, therefore, we do not desire to claim, broadly;but

We claim as our invention- The combination of the frame and lay of aloom and operating mechanism with the warp' beam, jointed -clips B,having extensions D, lever G, pivoted to the frame and having pulleys HH, adapted to act on the said extensions to compress the clips, the saidlever being adapted to be acted on by the lay, all substantially asdescribed.

.In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

GEO. F. DAWSON. JOHN MYERS. JOHN SMITH. Witnesses:

JOHN WAUGH, WILLIAM J. WAUGH.

